Antenna



FIG. 1 is a top-front perspective view of an antenna, showing our new design;

FIG. 2 is a top-rear perspective view thereof;

FIG. 3 is a bottom-right perspective view thereof;

FIG. 4 is a bottom-left perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a left side view thereof; and,

FIG. 10 is a right side view thereof.

The broken lines illustrate portions of the antenna that form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 